Lifting mechanism.



PATENTED JAN. 1, 1907. J. R. MILLER. LIFTING MECHANISM. APPLIOATIGN FILED MAR. 10, 1906.

Inren/for:

JOSEPH Rj MILLER, OF MANSFIELD,

OHIO. ASSIGNOR OF ONE-HALF TO WILLIAM MICHAEL, OF MANSFIELD, OHIO. LIFTING MECHANISM.

Specification of Letters Patent.

Patented Jan. 1. 1907.

7 Application filed March 10, 1906. Serial No. 306,264.

Be it known that I, JOSEPH R. MiLLnn, a citizen of the United States, residing at Mans- .iield,'in the county. of ltichland and State of Ohio, have invented.certainncw and useful improvements in s, Lifting Mechanism, of which the following is a specification.

My invention relates to improvements in lifting mechanism, and has forits object to provide means for lifting weights either by compressed air or any suitable liquid by forcing the same under a piston Within a cylinder,

said cylinder suspended from a suitablebeam or a movable support, so that it may be oper-' ated either by hand or power.

My invention further has for its object to provide a cheap, durable, and ellicient mech- I anism for the purpose stated.

These ob ects l accomplish by the device illustrated 1n the accompanying drawings, in wlnch- Figure 1 is a vertical sectional view of my improved lifting mechanism to be operated by compressed air or liquid pressure. Fig. 2 is a plan view of pipe connections from the compressed-air tank or pump. Fig. 3 is an enlarged detached view of the lower cylinderhead and pipe connections looking downward.

Similar figures of reference indicate the several parts throughout the several views.

Referring first to the compressed-air or steam operated mechanism, as fully illustratcd in Figs. 1, 2, and 3, the letter A designates the cylinder; B and B, the upper and lower heads, respectively. The said heads are provided with annular grooves or chan-" nels C, in which fit the ends of the cylinder. The said cylinder is clamped between the heads by means of the bolt-rods D, passing through the heads and having the nuts D mounted on the ends thereof. s

The upper head B is provided with a ring or eyebolt E for securing or suspending the cylinder to' any suitable trolley or carriage placed upon trackways on a carrierbean1. The upper and lower cylinder-heads are pro vided with inlet-ports F and F, respectively. The'said ports act forthe admission and exhaust for the compressed air or liquid which may be used. The flow to the ports F and F is controlled by the three-way cocks G and G. The said cocks are connected together by the pipe connectionH. The pipes are screwed 'to the ends of each lever.

what similar to the hand-machine.

'is also provided with a nipple and hose connection R.

S and S designate a line of pipes, Which may be of any length and secured to the side of the building. The ipe S is the su pl pipe, and the end may l ia connected with t 1e comprcssed-air tank or to a pump. When compressed air is used, the hose connection to the nipple R is dispensed with, as the air would exhaust through the 0 ening in the T- joint into the room; but should liquid be used the connection would then be made to carry the exhaust liquid back through the pipe S "into the supply-tank. The supply-pipe S is provided with a tension-valve T, which may be regulated to stand any pressure necessary. The object of the said valve is to allow the air or liquid to escape should the pressure become too great.

The valves G G levers V, W, and V respectively, and suitable hand or rod connections W W N are attached Coil-springs X X X are also connected to the lovers and to suitable fastenings on the pipe H to retain the valves in the normal position.

Y represents the piston-head, which is of common construction packed with suitable flexible packing B B represents the piston or lifting rod, provided at its lower end with a suitable hook B The operation of the power-lift is some The end of the pipe S is connected with a force-pump or compressed air cylinder, and the pipes L and L and R and R are connected together by rubber hose when a liquid is used. When the operator wishes to raise a load, the valves K and G are opened, allowing the, air or liquid to. pass through through the port F .into the cylinder below the piston, forcing the same upward and carand K are provided with the said valves and rying the load. The valve G- bei'r'ig open to the upper portion of the cylinder, theliquid there n passes through the valve into the pipe M, discharging through the hose into the discharge-pi e S, from thence into the liquidtank. Ti e tension-valve T is to allow the air orliquid to escape when the lift is not in use.

I claim- 1. In a power liftingmachine, a cylinder provided with heads formed with inlet-ports, three-way valves connected with the inletports, 1 vertical pipe connection between the valves, a globe-valve and a, T connection placed in line of said pipe, the said valves provided with levers, said levers held in normal position by coil-springs, it vertical discharge pipe connecting the three-way valves, flexile connections from the supply and discharge to stationary supply and discharge pipes, a piston endipistomrod within the eyl-- inder adapted to the load by compressed air orliquid, as set forth.

2. In a power lifting mechanism, the combination with a cylinder adapted for sdspen sion, said cylinder having heads provided. with inlet-ports, a piston within the cylinder provided at its'lower' end withe hook, of three-way valves connected with the inletports, a vertical supply-pipe between said valves, and a discharge-pipe connected between the Valves;

In testimony Whete'of I 'eflix my signature in presenceoftwo witnesses,

JOSEPH R. MILLER. YVitnesses:

W. H. Bo. 'ERS, WILLIAM It; IHAEL. 

